EP3647614A1 - Dispositif d'avancement linéaire et dispositif de traitement des objets équipé d'un tel dispositif d'avancement linéaire - Google Patents

Dispositif d'avancement linéaire et dispositif de traitement des objets équipé d'un tel dispositif d'avancement linéaire Download PDF

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Publication number
EP3647614A1
EP3647614A1 EP19195834.7A EP19195834A EP3647614A1 EP 3647614 A1 EP3647614 A1 EP 3647614A1 EP 19195834 A EP19195834 A EP 19195834A EP 3647614 A1 EP3647614 A1 EP 3647614A1
Authority
EP
European Patent Office
Prior art keywords
lubricant
feed
housing
hydrostatic bearing
feed element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19195834.7A
Other languages
German (de)
English (en)
Inventor
Kilian HENGGE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otto Bihler Handels Beteiligungs GmbH
Original Assignee
Otto Bihler Handels Beteiligungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otto Bihler Handels Beteiligungs GmbH filed Critical Otto Bihler Handels Beteiligungs GmbH
Publication of EP3647614A1 publication Critical patent/EP3647614A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/02—Sliding-contact bearings
    • F16C29/025—Hydrostatic or aerostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
    • F16C32/064—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
    • F16C32/0651—Details of the bearing area per se
    • F16C32/0659—Details of the bearing area per se of pockets or grooves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/1045—Details of supply of the liquid to the bearing
    • F16C33/1055—Details of supply of the liquid to the bearing from radial inside, e.g. via a passage through the shaft and/or inner sleeve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/14—Stamping, deep-drawing or punching, e.g. die sets

Definitions

  • Object processing devices with linear feed devices of the type considered here are known in multiple configurations, in particular as machine tools for processing workpieces.
  • the state of the art for example, on the EP 1 016 475 A2 Reference is made from which an object processing device with a linear feed device is known.
  • the linear feed device comprises a circular cylindrical tubular body as a feed element, which is mounted in a housing, so that it is guided along a feed axis - can be moved back and forth - and can be extended more or less from the housing or retracted into the housing.
  • the tubular feed element has a radially outer circular cylindrical guide surface.
  • a guide channel with a correspondingly complementary guide surface for the feed element is provided in the housing.
  • a ball screw drive driven by a controllable electric motor is provided with a spindle nut arranged in the tubular body and seated on a threaded spindle.
  • Appropriate control of the electric motor can be achieved via the ball screw drive that the non-rotatably mounted feed element performs a feed movement or retraction movement with respect to the housing.
  • its linear feed device can be provided with a grease nipple connection, which is connected via lubricant paths to the respective engagement area between the outer peripheral surface of the tubular body and the guide surface of the guide channel.
  • the lubrication nipple In continuous operation can the lubrication nipple must be connected to a lubricant supply system in order to ensure a regular supply of lubricant.
  • the present invention has for its object to provide a linear feed device which is suitable for generating high feed forces, such as are required for punching, bending and / or embossing objects, in particular metallic workpieces, the guidance and storage of the feed element largely backlash-free and wear-free and with low friction with good damping.
  • a higher-level aspect of the invention in its embodiments is that the bearing arrangement for storing and guiding the feed element is designed as a hydrostatic bearing with at least two hydrostatic bearing points arranged one behind the other in the longitudinal direction of the feed element, each of which has a number of lubricant pockets, which extend around the circumference of the Feed element are distributed around.
  • the lubricant pockets are to be supplied with pressurized lubricant from a lubricant source via lubricant channels that run in the housing and open into the lubricant pockets.
  • a lubricant oil is preferred.
  • all lubricant pockets are formed as depressions in the guide channel, that is to say the counter-running surface.
  • the lubricant pockets of a first hydrostatic bearing point are formed as depressions in the feed element on its periphery and are provided in the vicinity of the axially rear end of the feed element, whereas the lubricant pockets of a second hydrostatic bearing point are in the vicinity of the housing opening and in the circumferential direction of the Feed element distributed as recesses in the guide channel, that is formed in the counter surface.
  • both radial forces and torques generated by transverse forces acting on the feed element are effectively absorbed by the hydrostatic bearing points arranged one behind the other in the longitudinal direction of the feed element. This makes it possible, for example, to provide bending punches on the feed element without additional guidance and to operate them for bending processes, and to absorb process forces generated, as well as impacts, without play with very good damping.
  • Each bearing point should be designed with at least four lubricant pockets distributed as evenly as possible around the circumference of the feed element, which are supplied with lubricant under pressure via lubricant channels integrated in the housing.
  • Necessary pressure regulators can be recessed in the housing. The supply of such pressure regulators with pressurized lubricant can also be realized via bores integrated in the housing. In this way, only one lubricant pressure line to the housing is necessary. The lubricant can be returned, for example, via several return grooves distributed over the circumference of the bearing points.
  • the passage of the elongate feed element to the outside is sealed by a sealing arrangement against the escape of lubricant.
  • Possible controllable drive devices are in particular a planetary roller screw drive driven by a servo motor or a hydrostatic screw drive, which can generate high feed forces.
  • the lubricant pockets of a bearing point can have an unchanged axial distance from the lubricant pockets of a further bearing point in question.
  • the maximum torque that can be absorbed by the guide implemented according to the invention depends not only on the pressure in the lubricant pockets but also on the axial distance between the two bearing points.
  • the distance between the two hydrostatic bearing points is maximum in the embodiment of the invention. In this position, the greatest torque can be taken up by the guide. If the feed element is in the foremost position, the distance between the two hydrostatic bearing points is minimal. In this position, the torque that can be absorbed by the guide is the lowest.
  • the object of the invention is also an object processing device according to claim 11 for processing objects by a feed process of an object processing tool, the object processing device having a linear feed device according to the invention and the feed element of the linear feed device being designed as an object processing tool holder or being set up for connection to an object processing tool holder.
  • the first embodiment is described below with reference to FIG Figures 1 - 5 explained. It has an elongated housing 1, partially shown in the figures, with one Figure 5 visible outer outline.
  • the housing 1 forms a guide cylinder with a counter surface 2 for mounting and guiding an elongate feed element 3 which is essentially circular in cross section when it moves along a feed axis 4 between a position retracted into the housing 1 in accordance with FIG Figure 1 and according to a position advanced through the housing opening 5 Figure 2 .
  • a particularly in Figure 5 Easily recognizable slot nut 6 is firmly received in a receiving groove 7 of the feed element 3 and can be moved in a biased manner in the housing 1 parallel to the feed axis 4 by means of a hydrostatic bearing.
  • Lubricant pockets 8 of this hydrostatic bearing are provided in the sliding block 6. They are supplied with lubricant under pressure via holes 9 in the counter-running surface of the housing 1.
  • the sliding block 6 is designed on both latera sides with at least one lubricant pocket 8 each.
  • the position of the feed element 3 can be detected by an absolute position measuring system 10 mounted on the sliding block 6.
  • the bearing arrangement for mounting and guiding the feed element 3 for movement along the feed axis 4 is designed as a hydrostatic bearing with the mating surface 2 of a guide channel provided in the housing 1 and opposite the outer circumference of the feed element 3 and has two hydrostatic bearing points arranged one behind the other in the longitudinal direction of the feed element 3 11, 12 (cf. Figure 3 ).
  • Each of the two hydrostatic bearing points 11, 12 has a number of lubricant pockets 13a and 13b. In the example shown there are six lubricant pockets 13a and 13b per hydrostatic bearing point 11, 12.
  • the lubricant pockets 13a and 13b of the respective bearing point are distributed substantially uniformly on the circumference of the guide channel forming the counter-running surface 2 and are centered on a respective cross-sectional plane 14, 15.
  • the substantially identical concave lubricant pockets 13a and 13b when viewed in plan view, have a rectangular shape in the embodiment shown, elongated in the direction of the feed axis 4 (cf. Figure 3 ) and are arranged such that a respective lubricant pocket 13a of the first hydrostatic bearing point 11 is adjacent to a respective lubricant pocket 13b of the second hydrostatic bearing point 12 in alignment in the axial direction.
  • the two hydrostatic bearing points 11, 12 extend over an axial region of the guide cylinder counter-running surface 2, which at the maximum stroke of the feed element 3 between the positions according to FIGS Figure 2 is always overlapped by the outer circumference of the feed element 3, so that the feed element 3 is always hydrostatically supported by both hydrostatic bearing points 11, 12.
  • the lubricant pockets 13 are supplied with lubricant under pressure from a lubricant pressure source via bores 16 integrated in the housing. Pressure oil is preferably used as the lubricant. With 17 necessary pressure regulators are marked, which are mounted recessed in the housing 1. The pressure regulator 17 is also supplied with lubricant under pressure via bores integrated in the housing 1. As a result, only one pressure line for lubricant to the housing 1 is necessary.
  • the lubricant is returned via a plurality of return grooves 18 distributed over the circumference of the bearing points 11, 12, which can be designed axially and / or radially.
  • this is sealed to the outside by a seal against leakage of the lubricant.
  • the feed element 3 is tubular, with components on the back of a hydrostatic screw drive 19 or a roller screw drive or a ball screw drive (cf. Figure 4 ) are included, which can be driven by a controllable servo motor in order to exert a high feed force on the feed element 3 and to move it accordingly.
  • a linear feed unit for punching, bending or embossing with high feed force can be realized, wherein the feed element can be designed as an object processing tool carrier or can be set up for connection to such.
  • the housing 21 forms a guide cylinder with a guide channel corresponding to the counter-running surface 22 for mounting and guiding the elongate feed element 23, which is round in cross section, as it moves along the feed axis 24 between the position retracted into the housing 21 Figure 6 and according to the position advanced through the housing opening 25 Figure 7 .
  • the feed element 23 is secured against rotation about the feed axis 24.
  • the bearing arrangement for mounting and guiding the feed element 23 for movement along the feed axis 24 is designed as a hydrostatic bearing with the counter surface 22.
  • the bearing arrangement comprises a first hydrostatic bearing point (cf. 31 in Figure 6 and Figure 7 ) and a second hydrostatic bearing (see 32 in Figure 8 and Figure 9 ).
  • the first hydrostatic bearing point 31 is defined by a group of lubricant pockets 33a, which are formed as depressions on the circumference of the feed element 23 therein. They are located in the vicinity of the rear end of the feed element 23, have essentially the same shape and are arranged lying on the circumference of the feed element 23 in a distributed manner on a common cross-sectional plane.
  • the second hydrostatic bearing point 32 is characterized by a group of lubricant pockets 33b which are formed in the counter surface 22 of the guide cylinder in the housing 21. They are located near the front housing opening 25, have essentially the same shape and are arranged evenly distributed over the inner circumference of the guide channel.
  • the lubricant pockets 33a of the first hydrostatic bearing point 31 are thus also moved during the advancing and retracting movements of the advancing element 23.
  • the lubricant pockets 33a are tapered in the manner of a wedge starting from a base arranged near the rear end of the feed element 23 with increasing axial distance therefrom in the direction of the front end. In the example, they approximately have the shape of a gabled pentagon.
  • the lubricant pockets 33b of the second hydrostatic bearing point 32 have a similar shape, which, viewed in plan view, are tapered in the manner of a wedge starting from a base arranged near the housing opening 25 with increasing axial distance therefrom in the direction of the housing interior.
  • the lubricant pockets 33a of the first hydrostatic bearing point 31 are offset relative to the lubricant pockets 33b of the second hydrostatic bearing point 32 in the circumferential direction of the feed element 23 in its intended installation position, so that the narrowest points (tips) of the lubricant pockets 33a viewed in the axial direction refer to the respective space between two adjacent lubricant pockets 33b are aligned.
  • the lubricant pockets 33b are supplied with lubricant under pressure via bores 36b in the housing 21.
  • the lubricant pockets 33a are supplied with lubricant under pressure via bores 36a in the housing 21.
  • the shape of the lubricant pockets 33a and the geometric arrangement of the bores 36a opening laterally into the guide channel ensure that the lubricant pockets 33a of the first hydrostatic bearing point 31 can be supplied with lubricant under pressure in any stroke position of the feed element 23.
  • the feed element 23 is in its retracted position according to Figure 6 , the distance between the two bearing points 31 and 32 is maximum. In this position, the greatest torque can be absorbed by the linear feed device.
  • the feed element 23 is in its foremost position according to FIG Figure 7 , the distance between the two bearing points 31, 32 is minimal. In this case, the torque that can be absorbed by the linear feed device is the lowest.
  • the maximum possible bearing distance can be used for each stroke position.
  • the feed lines to the bores 36a, 36b are, similarly to the first exemplary embodiment, bores integrated in the housing 21, which feed the lubricant under pressure.
  • the feed element 23 is tubular, whereby it is coupled to a hydrostatic screw drive or a roller screw drive or a ball screw drive, which is driven by a controllable servo motor, in order to exert a high feed force on the feed element 23 and to move it accordingly, in accordance with the configuration of the first exemplary embodiment .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Bearings For Parts Moving Linearly (AREA)
EP19195834.7A 2018-10-29 2019-09-06 Dispositif d'avancement linéaire et dispositif de traitement des objets équipé d'un tel dispositif d'avancement linéaire Withdrawn EP3647614A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018218482.8A DE102018218482A1 (de) 2018-10-29 2018-10-29 Linearvorschubeinrichtung und eine damit ausgerüstete objektbearbeitungseinrichtung

Publications (1)

Publication Number Publication Date
EP3647614A1 true EP3647614A1 (fr) 2020-05-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19195834.7A Withdrawn EP3647614A1 (fr) 2018-10-29 2019-09-06 Dispositif d'avancement linéaire et dispositif de traitement des objets équipé d'un tel dispositif d'avancement linéaire

Country Status (2)

Country Link
EP (1) EP3647614A1 (fr)
DE (1) DE102018218482A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013299A (en) * 1963-10-17 1965-12-15 Richards & Co Ltd George Fluid bearing
JPH11264404A (ja) * 1998-03-18 1999-09-28 Ckd Corp エアベアリングシリンダ、エアベアリングシリンダ用ロッド及びマニホールドシリンダ
EP1016475A2 (fr) 1998-12-28 2000-07-05 Otto Bihler Handels-Beteiligungs-GmbH Dispositif de travail
JP2002333022A (ja) * 2001-03-09 2002-11-22 Toto Ltd 静圧気体軸受
EP2213891A1 (fr) * 2007-10-19 2010-08-04 Bosch Corporation Dispositif de coulisseau hydrostatique et dispositif de meulage équipé d'un dispositif de coulisseau hydrostatique
EP2587080A1 (fr) * 2011-10-28 2013-05-01 Jtekt Corporation Palier hydrostatique à débit variable
CN103899644A (zh) * 2014-03-12 2014-07-02 哈尔滨工程大学 阶梯式复合节流气浮导轨

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986585A (en) * 1962-04-19 1965-03-17 David Theodore Nelson Williams Improvements in or relating to hydraulic systems
US3635532A (en) * 1969-02-08 1972-01-18 Riv Officine Di Villar Perosa Hydrostatically supported machine tool slide
JPS4836135B1 (fr) * 1970-02-26 1973-11-01
FR2399593A1 (fr) * 1977-08-01 1979-03-02 Bertin & Cie Dispositif d'etancheite pour mecanisme hydraulique a piston
US6086255A (en) * 1998-07-28 2000-07-11 Thompson Industries, Inc. Hydrostatic bearing and fluid collection system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013299A (en) * 1963-10-17 1965-12-15 Richards & Co Ltd George Fluid bearing
JPH11264404A (ja) * 1998-03-18 1999-09-28 Ckd Corp エアベアリングシリンダ、エアベアリングシリンダ用ロッド及びマニホールドシリンダ
EP1016475A2 (fr) 1998-12-28 2000-07-05 Otto Bihler Handels-Beteiligungs-GmbH Dispositif de travail
JP2002333022A (ja) * 2001-03-09 2002-11-22 Toto Ltd 静圧気体軸受
EP2213891A1 (fr) * 2007-10-19 2010-08-04 Bosch Corporation Dispositif de coulisseau hydrostatique et dispositif de meulage équipé d'un dispositif de coulisseau hydrostatique
EP2587080A1 (fr) * 2011-10-28 2013-05-01 Jtekt Corporation Palier hydrostatique à débit variable
CN103899644A (zh) * 2014-03-12 2014-07-02 哈尔滨工程大学 阶梯式复合节流气浮导轨

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